JPH02309273A - Partial discharge pulse detector - Google Patents
Partial discharge pulse detectorInfo
- Publication number
- JPH02309273A JPH02309273A JP1130007A JP13000789A JPH02309273A JP H02309273 A JPH02309273 A JP H02309273A JP 1130007 A JP1130007 A JP 1130007A JP 13000789 A JP13000789 A JP 13000789A JP H02309273 A JPH02309273 A JP H02309273A
- Authority
- JP
- Japan
- Prior art keywords
- partial discharge
- detector
- detection coil
- power cable
- optical fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000013307 optical fiber Substances 0.000 claims abstract description 14
- 230000035699 permeability Effects 0.000 claims abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 14
- 238000004804 winding Methods 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は簿電状態のまま電気機器の部分放電パルスを検
出する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a device for detecting partial discharge pulses in electrical equipment while the electrical equipment is in a booked state.
（従来の技術）
回転電機の異常、特に固定子巻線の劣化を判定するため
に従来から回転電機を停止した後、巻線に高圧を印加し
電気諸物性（絶縁抵抗、交流電流、誘電体損失角、部分
放電等）を測定して巻線絶縁物の劣化度を判定する方法
と、打音により絶縁物の機械的損傷や巻線固定力劣化を
判定する機械的な方法が用いられてきた。これらの劣化
判定を行うには回°転電機の停止、線路の切り離し、場
合によっては固定子抜き取りなどの作業を要し。(Conventional technology) Conventionally, in order to determine abnormalities in rotating electric machines, especially deterioration of stator windings, after stopping the rotating electric machine, high voltage is applied to the windings and various electrical properties (insulation resistance, alternating current, dielectric Two methods have been used: one is to measure the degree of deterioration of the winding insulation (loss angle, partial discharge, etc.), and the other is a mechanical method to determine mechanical damage to the insulation and deterioration of the winding fixing force based on hammering sounds. Ta. Determining these types of deterioration requires work such as stopping the rotating electric machine, disconnecting the line, and in some cases removing the stator.
絶縁劣化判定のために多大な時間、労力、費用が必要に
なり、頻繁な劣化判定を実施することが困難となり、劣
化が急速に進行するような場合には。In cases where a great deal of time, effort, and expense are required to determine insulation deterioration, it becomes difficult to perform frequent deterioration determinations, and deterioration progresses rapidly.
十分な対応ができないこともあった。Sometimes it was not possible to respond adequately.
この欠点を取り除くため、回転電機の運転中に部分放電
測定を行う検出装置（実開昭６Ｏ−１５８１６７）が実
用化され、測定された部分放電パルスが電源電圧位相の
どの位相に発生しているかを解析する絶縁物の劣化判定
技術（特開昭５８−１５３１８３．特開昭６Ｏ−２０３
８６６）も実用化されている。しかし、このような方法
は解析に必要な電源電圧位相の検出のためには、回転電
機を停止し安全上、系統を取り離した後、回転電機の端
子絶縁を取り除いて導体に電源電圧位相検出装置を接続
しなければならず１巻線の劣化判定のために２回転型機
の接続変更が必要であった。これまでの電源電圧位相検
出装置は回転電機の電源が高電圧であるため、通常、計
器用変圧器（以下ＰＴと称する）により降圧して部分放
電測定系に接続されている１回転基機の接続変更を部分
放電測定のたびに行わなくてもいいように、ＰＴを常設
する方法もあるが、この場合、ＰＴの異常時用の保護装
置が必要で、ＰＴを含めたそれらの保護装置の保守点検
も必要であった。In order to eliminate this drawback, a detection device (Utility Model Application No. 6O-158167) was put into practical use that measures partial discharge during the operation of a rotating electric machine, and it is possible to determine in which phase of the power supply voltage phase the measured partial discharge pulse occurs. Deterioration determination technology for insulators to analyze
866) has also been put into practical use. However, in order to detect the power supply voltage phase required for analysis, this method requires stopping the rotating electrical machine and disconnecting the system for safety, then removing the terminal insulation of the rotating electrical machine and detecting the power voltage phase on the conductor. The equipment had to be connected, and it was necessary to change the connection of the two-rotation machine in order to determine the deterioration of the first winding. Conventional power supply voltage phase detection devices usually use a potential transformer (hereinafter referred to as PT) to step down the voltage of the rotating electrical machine connected to the partial discharge measurement system because the power source of the rotating electrical machine is high voltage. There is a method of permanently installing a PT so that connection changes do not have to be made every time a partial discharge measurement is performed, but in this case, a protection device is required in case of an abnormality of the PT, and those protection devices including the PT Maintenance and inspection were also necessary.
（発明が解決しようとする課題）
上記のように、従来技術の欠点は、電源電圧位相の検品
のための検出器接続作業は回転電機の運転を停止し系統
を切り離してから行わなければならないこと、電源電圧
位相検出器であるＰＴの常設は、ＰＴの異常時用の保護
装置が必要であること、またそれらの保守点検が必要で
あることなどであった。(Problem to be Solved by the Invention) As mentioned above, the drawback of the conventional technology is that the work of connecting a detector for inspecting the power supply voltage phase must be performed after stopping the operation of the rotating electric machine and disconnecting the system. However, the permanent installation of a PT, which is a power supply voltage phase detector, requires a protection device in case of an abnormality of the PT, and requires maintenance and inspection of the PT.
従って、本発明は上記課題を解決し、回転電機固定子巻
線等の劣化判定に必要な部分放電パルスと電源電圧位相
を容易に検出できる部分放電パルス検出装置の提供を目
的とする。Therefore, it is an object of the present invention to solve the above problems and provide a partial discharge pulse detection device that can easily detect partial discharge pulses and power supply voltage phases necessary for determining deterioration of a stator winding of a rotating electrical machine.
（課題を解決するための手段）
本発明の部分放電パルス検出装置は上記目的を達成する
ため電力ケーブルに接触された光ファイバ電圧検出器と
、前記電力ケーブルの貫通するトロイダルコアと、この
トロイダルコアに巻付けられた検出コイルより成ること
を特徴とする。(Means for Solving the Problems) In order to achieve the above object, the partial discharge pulse detection device of the present invention includes: an optical fiber voltage detector that is in contact with a power cable; a toroidal core that the power cable passes through; It is characterized by consisting of a detection coil wound around.
（作用） 本発明の部分放電パルス検出装置によれば。(effect) According to the partial discharge pulse detection device of the present invention.
電気機器の端子などの導体に部分放電パルス検出装置の
接続することなく導体被覆の上から、検出コイルによっ
て部分放電の電気信号を、また、光ファイバ電圧検出器
で電源電圧位相を検出する。The electric signal of partial discharge is detected by the detection coil, and the power supply voltage phase is detected by the optical fiber voltage detector from above the conductor coating without connecting the partial discharge pulse detection device to the conductor such as the terminal of the electric equipment.
（実施例）
以下本発明について第１図および第２図に示す一実施例
をもとに説明する６本実施例の部分放電パルス検出装置
は、回転電機の電力ケーブルＪ。(Embodiment) The present invention will be described below based on an embodiment shown in FIGS. 1 and 2. A partial discharge pulse detection device according to six embodiments is applied to a power cable J of a rotating electric machine.
が貫通する高透磁率のトロイダルコア２と、そのトロイ
ダルコア２に巻付けられた検出コイル３と、この検出コ
イル３に接続された電流検出器４と、光ファイバ電圧検
出器５から成る。検出コイル３は部分放電電気信号入力
回路６、光ファイバ電圧検出器５は光−電気交換器７を
介してそれぞれ部分放電測定器８に接続する。It consists of a toroidal core 2 of high magnetic permeability through which the toroidal core 2 passes, a detection coil 3 wound around the toroidal core 2, a current detector 4 connected to the detection coil 3, and an optical fiber voltage detector 5. The detection coil 3 is connected to a partial discharge electric signal input circuit 6, and the optical fiber voltage detector 5 is connected to a partial discharge measuring device 8 via an optical-electrical exchanger 7.
トロイダルコア２はＴＤＫ （株）製フェライトコアＰ
Ｅ−１を使用し、光ファイバ電圧検出器５は、第２図の
ようにポッケルス素子９、検光子１０．１／４波長板１
１．偏光子１２で構成し、ポッケルス素子９の面１３を
電力ケーブル１の被覆の上から接触させ、面１４はアー
ス電位とする。Toroidal core 2 is ferrite core P manufactured by TDK Corporation.
E-1 is used, and the optical fiber voltage detector 5 includes a Pockels element 9, an analyzer 10, and a 1/4 wavelength plate 1 as shown in FIG.
1. It is composed of a polarizer 12, and the surface 13 of the Pockels element 9 is brought into contact with the covering of the power cable 1 from above, and the surface 14 is set at ground potential.
電流検出器４は、トロイダルコア２に透磁率が２１００
（Ｈ／ｍ）でかつ高周波領域までその透磁率が一定のフ
ェライトコアＰＥ−１を使用したので、トロイダルコア
２に回転電機の電力ケーブル１を通すだけで２部分数電
信号である高周波パルス信号を検出できる。また、光フ
ァイバ電圧検出器５はポッケルス素子９を主体としたの
で、面１３と面１４間の電位差により素子の屈折率が変
化する。光−電気変換器７で光強度を電気的処理し電圧
に変換して電力ケーブルｌの電源電圧位相が検出できる
。The current detector 4 has a toroidal core 2 with a magnetic permeability of 2100.
(H/m) and whose magnetic permeability is constant up to the high frequency range is used, so just by passing the power cable 1 of the rotating electrical machine through the toroidal core 2, a high frequency pulse signal, which is a two-part electric signal, can be generated. can be detected. Furthermore, since the optical fiber voltage detector 5 mainly includes the Pockels element 9, the refractive index of the element changes due to the potential difference between the surfaces 13 and 14. The optical-to-electrical converter 7 electrically processes the light intensity and converts it into voltage, allowing the phase of the power supply voltage of the power cable 1 to be detected.
電流検出器４と光ファイバ電圧検出器５は、いずれも電
力ケーブル１の被覆の上から電流や電圧が検出できるた
め１回転基機の端子や線路等の導体に検出器を接続しな
くても回転電機巻線の絶縁や固定力の劣化の検知に必要
な部分放電の情報を精度よく検出できる。Both the current detector 4 and the optical fiber voltage detector 5 can detect current and voltage from above the coating of the power cable 1, so there is no need to connect the detector to a conductor such as a terminal or line of the single rotation base machine. It is possible to accurately detect partial discharge information necessary for detecting deterioration of the insulation and fixing force of rotating electrical machine windings.
電力ケーブル１の直径が大きいとポッケルス素子９の面
１３と電力ケーブルが十分に接触しない場合は、第３図
に示すように導電性あるいは半導電性の接触片１５を面
１３に設ける。この構成によれば。If the power cable 1 has a large diameter and the power cable does not make sufficient contact with the surface 13 of the Pockels element 9, a conductive or semiconductive contact piece 15 is provided on the surface 13 as shown in FIG. According to this configuration.
電力ケーブルが十分ポッケルス素子の片面に接触するこ
とができ、電源電圧位相を精度よく検出できる。また、
電流検出器４のトロイダルコア２は円形にかぎらず楕円
形、角形であっても同様な動作を得ることができる。更
にはトロイダルコア２を、例えば円形を１７２に切断し
たＵ字形とし、切断面相互を合わせて使用する。このよ
うな２分割トロイダルコアは回転電機を一時停止するこ
となく電力ケーブル１をトロイダルコア２の中に通す作
業が容易にできる。The power cable can sufficiently contact one side of the Pockels element, and the power supply voltage phase can be detected with high accuracy. Also,
The toroidal core 2 of the current detector 4 is not limited to a circular shape, and even if it is oval or square, the same operation can be obtained. Further, the toroidal core 2 is made into a U-shape, for example, by cutting a circle into 172 pieces, and the cut surfaces are aligned with each other. Such a two-part toroidal core allows the power cable 1 to be easily passed through the toroidal core 2 without temporarily stopping the rotating electric machine.
以上説明したように、対象機の線路の電圧位相を、線路
に接続することなく検出できる部分放電パルス検出装置
としたので、電気機器の停止無しに検出装置を取り付け
ることができ、部分放電を精度よく測定できるため、運
転中の電気機器の絶縁劣化や固定力劣化の診断が容易に
できる。As explained above, we have used a partial discharge pulse detection device that can detect the voltage phase of the line of the target machine without connecting it to the line, so the detection device can be installed without stopping electrical equipment, and the partial discharge can be detected accurately. Since it can be measured well, it is easy to diagnose insulation deterioration and fixing strength deterioration of electrical equipment during operation.
第１図は本発明の一実施例を示す接続図、第２図は本発
明の光ファイバ電圧検出器を示す斜視図、第３図は光フ
ァイバ電圧検出器の他の実施例を示す斜視図である。
１・・・電力ケーブル、 ２・・・トロイダルコ
ア、３・・・検出コイル、 ４・・・電流検品器
、５・・・光ファイバ電圧検出器、
６・・・部分放電電気信号入力回路、
７・・・光−電気変換器、 ８・・・部分放電測定器
。
９・・・ポッケルス素子、 ｌＯ・・・検光子、１１
・・・１／４波長板、 １２・・・偏光子、１３．
１４・・・面、 １５・・・接触片。
代理人 弁理士 則 近 憲 佑
同 第子丸 健
第１図
第２図
第３図Fig. 1 is a connection diagram showing one embodiment of the present invention, Fig. 2 is a perspective view showing an optical fiber voltage detector of the invention, and Fig. 3 is a perspective view showing another embodiment of the optical fiber voltage detector. It is. DESCRIPTION OF SYMBOLS 1... Power cable, 2... Toroidal core, 3... Detection coil, 4... Current inspection device, 5... Optical fiber voltage detector, 6... Partial discharge electrical signal input circuit, 7... Optical-electrical converter, 8... Partial discharge measuring device. 9... Pockels element, lO... analyzer, 11
...1/4 wavelength plate, 12...Polarizer, 13.
14... Surface, 15... Contact piece. Agent Patent Attorney Nori Ken Yudo Daishimaru Figure 1 Figure 2 Figure 3
Claims (1)
このトロイダルコアに巻付けられた検出コイルと、この
検出コイルに接続された電流検出器と、前記電力ケーブ
ルに接触された光ファイバ電圧検出器とを備えたことを
特徴とした部分放電パルス検出装置。A toroidal core with high magnetic permeability through which the power cable passes,
A partial discharge pulse detection device comprising a detection coil wound around the toroidal core, a current detector connected to the detection coil, and an optical fiber voltage detector connected to the power cable. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130007A JPH02309273A (en) | 1989-05-25 | 1989-05-25 | Partial discharge pulse detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130007A JPH02309273A (en) | 1989-05-25 | 1989-05-25 | Partial discharge pulse detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02309273A true JPH02309273A (en) | 1990-12-25 |
Family
ID=15023844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1130007A Pending JPH02309273A (en) | 1989-05-25 | 1989-05-25 | Partial discharge pulse detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02309273A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017153344A (en) * | 2016-02-25 | 2017-08-31 | 三菱日立パワーシステムズ株式会社 | Rotary electric machine and method of detecting abnormality of the same |
-
1989
- 1989-05-25 JP JP1130007A patent/JPH02309273A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017153344A (en) * | 2016-02-25 | 2017-08-31 | 三菱日立パワーシステムズ株式会社 | Rotary electric machine and method of detecting abnormality of the same |
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